![]() Cardinality allows you express the number of each entity that can be associated with another entity. ![]() In other words, there will be multiple instances of each entity in a database. In other words, cardinality specifies the maximum number of relationships and ordinality specifies the absolute minimum number of relationships. While cardinality specifies the occurrences of a relationship, ordinality describes the relationship as either mandatory or optional. Ordinality is also closely linked to cardinality. In relationship to databases and ERD, cardinality specifies how many instances of an entity relate to one instance of another entity. It can be one-to-one, many-to-one, or many-to-many.Ĭardinality is the mathematical sense just means the number of values in a set.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |